Finding the Fourth Proportional to 139,293.76, 209,023.66 and 50,554.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,293.76 : 209,023.66 = 50,554.20 : x
2. Step 2: Convert to fraction form
   139,293.76/209,023.66 = 50,554.20/x
3. Step 3: Cross multiply
   139,293.76x = 209,023.66 × 50,554.20
4. Step 4: Simplify right side
   139,293.76x = 10,567,023,912.37
5. Step 5: Solve for x
   x = 10,567,023,912.37/139,293.76
6. Step 6: Final answer
   x = 75,861.43